President Trump met with Ukraine's President Zelenskyy at the White House for about an hour Monday in an accelerated effort to end the war on terms acceptable to both sides. The pair then met with European leaders to work toward a breakthrough in a conflict that Trump himself has cautioned could erupt in a third world war if it were allowed to persist. For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/ » Subscribe to MSNBC: https://www.